Private/New-FluenceInputControl.ps1

<#
Copyright (c) 2026, Dan Cunningham. All rights reserved.

Redistribution and use in source and binary forms, with or without
modification, are permitted provided that the following conditions are met:

1. Redistributions of source code must retain the above copyright notice,
   this list of conditions and the following disclaimer.

2. Redistributions in binary form must reproduce the above copyright notice,
   this list of conditions and the following disclaimer in the documentation
   and/or other materials provided with the distribution.

3. Neither the name of the copyright holder nor the names of its
   contributors may be used to endorse or promote products derived from
   this software without specific prior written permission.

THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDER OR CONTRIBUTORS BE LIABLE
FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR
SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER
CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY,
OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
#>



function New-FluenceInputControl
{
    <#
    .SYNOPSIS
        Builds the WPF input control for a single Fluence.Prompt and wires its change capture.
    .DESCRIPTION
        Returns one FrameworkElement (a composite StackPanel for Radio and File/Folder prompts)
        rendered with Fluence controls and the seeded theme. Pre-seeds $State.Result[$Prompt.Name]
        with the prompt's DefaultValue and wires the control's change event to write the live value
        back into $State.Result so an untouched field still returns its default. Every handler uses
        GetNewClosure so it captures the current $State and the control instance.
    .PARAMETER Prompt
        A Fluence.Prompt object (see New-FluencePrompt).
    .PARAMETER State
        The shared @{ Result = @{}; Window = $null } hashtable that accumulates captured values.
    .OUTPUTS
        System.Windows.FrameworkElement
    .NOTES
        Must run on a UI (STA) thread; call it through the window builder. No hard-coded colors:
        Fluence controls resolve their own themed brushes from the seeded slots.
    #>

    [CmdletBinding()]
    [OutputType([System.Windows.FrameworkElement])]
    [Diagnostics.CodeAnalysis.SuppressMessageAttribute('PSUseShouldProcessForStateChangingFunctions', '',
        Justification = 'Builds a WPF control tree in memory; changes no external system state.')]
    param
    (
        [Parameter(Mandatory = $true)]
        [object]$Prompt,

        [Parameter(Mandatory = $true)]
        [hashtable]$State
    )

    $name = $Prompt.Name

    # Pre-seed the result with the default so an untouched field still returns its default.
    $State.Result[$name] = $Prompt.DefaultValue

    switch ($Prompt.InputType)
    {
        'Multiline'
        {
            $ctl = [Fluence.Wpf.Controls.TextBox]::new()
            $ctl.AcceptsReturn = $true
            $ctl.TextWrapping = [System.Windows.TextWrapping]::Wrap
            $ctl.MinLines = 3
            if ($null -ne $Prompt.DefaultValue)
            {
                $ctl.Text = [string]$Prompt.DefaultValue
            }
            $ctl.add_TextChanged({
                $State.Result[$name] = $ctl.Text
            }.GetNewClosure())
            return $ctl
        }

        'Password'
        {
            # System.Windows.Controls.PasswordBox is sealed, so the library styles the native type through an
            # implicit style and exposes its extras as PasswordBoxExtensions attached properties.
            $ctl = [System.Windows.Controls.PasswordBox]::new()
            [Fluence.Wpf.Controls.PasswordBoxExtensions]::SetRevealButtonEnabled($ctl, $true)
            if ($null -ne $Prompt.DefaultValue)
            {
                $ctl.Password = [string]$Prompt.DefaultValue
            }
            $asPlainText = [bool]$Prompt.AsPlainText
            if ($asPlainText)
            {
                $State.Result[$name] = $ctl.Password
            }
            else
            {
                $State.Result[$name] = $ctl.SecurePassword
            }
            $ctl.add_PasswordChanged({
                if ($State.Result[$name] -is [System.Security.SecureString])
                {
                    $State.Result[$name].Dispose()
                }
                if ($asPlainText)
                {
                    $State.Result[$name] = $ctl.Password
                }
                else
                {
                    $State.Result[$name] = $ctl.SecurePassword
                }
            }.GetNewClosure())
            return $ctl
        }

        'Number'
        {
            $ctl = [Fluence.Wpf.Controls.NumberBox]::new()
            if ($null -ne $Prompt.DefaultValue)
            {
                $ctl.Value = [double]$Prompt.DefaultValue
            }
            # Seed from the control's live value (the NumberBox Value default is 0, not $null) so an
            # untouched field returns a number rather than $null; ValueChanged does not fire on the
            # initial render.
            $State.Result[$name] = $ctl.Value
            $ctl.add_ValueChanged({
                $State.Result[$name] = $ctl.Value
            }.GetNewClosure())
            return $ctl
        }

        'Checkbox'
        {
            $ctl = [Fluence.Wpf.Controls.CheckBox]::new()
            $ctl.Content = $Prompt.Message
            if ($null -ne $Prompt.DefaultValue)
            {
                $ctl.IsChecked = [bool]$Prompt.DefaultValue
            }
            # Seed from the control's live state so an untouched checkbox returns a [bool] (false when
            # there is no default), not the raw/typeless pre-seed; Click only fires on interaction.
            $State.Result[$name] = $ctl.IsChecked
            $ctl.add_Click({
                $State.Result[$name] = $ctl.IsChecked
            }.GetNewClosure())
            return $ctl
        }

        'Toggle'
        {
            $ctl = [Fluence.Wpf.Controls.ToggleSwitch]::new()
            $ctl.OnContent = 'On'
            $ctl.OffContent = 'Off'
            if ($null -ne $Prompt.DefaultValue)
            {
                $ctl.IsChecked = [bool]$Prompt.DefaultValue
            }
            # Seed from the control's live state so an untouched toggle returns a [bool] (false when
            # there is no default), not the raw/typeless pre-seed; Click only fires on interaction.
            $State.Result[$name] = $ctl.IsChecked
            $ctl.add_Click({
                $State.Result[$name] = $ctl.IsChecked
            }.GetNewClosure())
            return $ctl
        }

        'Choice'
        {
            if ($Prompt.As -eq 'Radio')
            {
                $panel = [System.Windows.Controls.StackPanel]::new()
                $panel.Orientation = [System.Windows.Controls.Orientation]::Vertical
                $State.Result[$name] = $null
                foreach ($option in $Prompt.ValidateSet)
                {
                    $radio = [Fluence.Wpf.Controls.RadioButton]::new()
                    $radio.Content = $option
                    $radio.GroupName = $name
                    $radio.Margin = [System.Windows.Thickness]::new(0, 2, 0, 2)
                    if ($null -ne $Prompt.DefaultValue -and [string]$option -eq [string]$Prompt.DefaultValue)
                    {
                        $radio.IsChecked = $true
                        $State.Result[$name] = $option
                    }
                    $radio.add_Checked({
                        $State.Result[$name] = $radio.Content
                    }.GetNewClosure())
                    $null = $panel.Children.Add($radio)
                }
                return $panel
            }

            $ctl = [Fluence.Wpf.Controls.ComboBox]::new()
            foreach ($option in $Prompt.ValidateSet)
            {
                $null = $ctl.Items.Add($option)
            }
            if ($null -ne $Prompt.DefaultValue)
            {
                $ctl.SelectedItem = $Prompt.DefaultValue
            }
            $State.Result[$name] = $ctl.SelectedItem
            $ctl.add_SelectionChanged({
                $State.Result[$name] = $ctl.SelectedItem
            }.GetNewClosure())
            return $ctl
        }

        'List'
        {
            $ctl = [Fluence.Wpf.Controls.ListView]::new()
            $ctl.MaxHeight = 240
            foreach ($option in $Prompt.ValidateSet)
            {
                $null = $ctl.Items.Add($option)
            }

            if ($Prompt.MultiSelect)
            {
                $ctl.SelectionMode = [System.Windows.Controls.SelectionMode]::Extended
                foreach ($default in @($Prompt.DefaultValue))
                {
                    if ($null -ne $default -and $Prompt.ValidateSet -contains [string]$default)
                    {
                        $null = $ctl.SelectedItems.Add([string]$default)
                    }
                }
                # Always an array, even for zero or one selected item, so callers can index and count.
                $State.Result[$name] = [object[]]@($ctl.SelectedItems)
                $ctl.add_SelectionChanged({
                    $State.Result[$name] = [object[]]@($ctl.SelectedItems)
                }.GetNewClosure())
                return $ctl
            }

            $ctl.SelectionMode = [System.Windows.Controls.SelectionMode]::Single
            if ($null -ne $Prompt.DefaultValue)
            {
                $ctl.SelectedItem = [string]$Prompt.DefaultValue
            }
            $State.Result[$name] = $ctl.SelectedItem
            $ctl.add_SelectionChanged({
                $State.Result[$name] = $ctl.SelectedItem
            }.GetNewClosure())
            return $ctl
        }

        'Date'
        {
            $ctl = [Fluence.Wpf.Controls.DatePicker]::new()
            if ($null -ne $Prompt.DefaultValue)
            {
                $ctl.SelectedDate = [datetime]$Prompt.DefaultValue
                $State.Result[$name] = $ctl.SelectedDate
            }
            $ctl.add_SelectedDateChanged({
                $State.Result[$name] = $ctl.SelectedDate
            }.GetNewClosure())
            return $ctl
        }

        'Time'
        {
            $ctl = [Fluence.Wpf.Controls.TimePicker]::new()
            if ($null -ne $Prompt.DefaultValue)
            {
                $ctl.SelectedTime = [timespan]$Prompt.DefaultValue
                $State.Result[$name] = $ctl.SelectedTime
            }
            $ctl.add_SelectedTimeChanged({
                $State.Result[$name] = $ctl.SelectedTime
            }.GetNewClosure())
            return $ctl
        }

        'Link'
        {
            $ctl = [Fluence.Wpf.Controls.HyperlinkButton]::new()
            $text = $Prompt.Message
            if ([string]::IsNullOrWhiteSpace($text))
            {
                $text = [string]$Prompt.DefaultValue
            }
            $ctl.Content = $text
            if ($null -ne $Prompt.DefaultValue)
            {
                $ctl.NavigateUri = [uri]$Prompt.DefaultValue
            }
            # No change capture; the pre-seeded default value is the result.
            return $ctl
        }

        { $_ -in 'FileOpen', 'FileSave', 'FolderOpen' }
        {
            $panel = [System.Windows.Controls.StackPanel]::new()
            $panel.Orientation = [System.Windows.Controls.Orientation]::Horizontal

            $textBox = [Fluence.Wpf.Controls.TextBox]::new()
            $textBox.MinWidth = 240
            if ($null -ne $Prompt.DefaultValue)
            {
                $textBox.Text = [string]$Prompt.DefaultValue
            }
            $textBox.add_TextChanged({
                $State.Result[$name] = $textBox.Text
            }.GetNewClosure())

            $browse = [Fluence.Wpf.Controls.Button]::new()
            $browse.Content = 'Browse...'
            $browse.Margin = [System.Windows.Thickness]::new(8, 0, 0, 0)

            $inputType = $Prompt.InputType
            $browse.add_Click({
                if ($inputType -eq 'FolderOpen')
                {
                    # FolderBrowserDialog works on both PowerShell editions; the net8-only
                    # Microsoft.Win32.OpenFolderDialog must not be used here.
                    Add-Type -AssemblyName System.Windows.Forms
                    $folderDialog = [System.Windows.Forms.FolderBrowserDialog]::new()
                    if (-not [string]::IsNullOrWhiteSpace($textBox.Text))
                    {
                        $folderDialog.SelectedPath = $textBox.Text
                    }
                    if ($folderDialog.ShowDialog() -eq [System.Windows.Forms.DialogResult]::OK)
                    {
                        $textBox.Text = $folderDialog.SelectedPath
                    }
                    $folderDialog.Dispose()
                    return
                }

                if ($inputType -eq 'FileSave')
                {
                    $fileDialog = [Microsoft.Win32.SaveFileDialog]::new()
                }
                else
                {
                    $fileDialog = [Microsoft.Win32.OpenFileDialog]::new()
                }
                if (-not [string]::IsNullOrWhiteSpace($textBox.Text))
                {
                    $fileDialog.FileName = $textBox.Text
                }
                if ($fileDialog.ShowDialog() -eq $true)
                {
                    $textBox.Text = $fileDialog.FileName
                }
            }.GetNewClosure())

            $null = $panel.Children.Add($textBox)
            $null = $panel.Children.Add($browse)
            return $panel
        }

        default
        {
            # Text (and any unmapped type) renders as a single-line TextBox.
            $ctl = [Fluence.Wpf.Controls.TextBox]::new()
            if ($null -ne $Prompt.DefaultValue)
            {
                $ctl.Text = [string]$Prompt.DefaultValue
            }
            $ctl.add_TextChanged({
                $State.Result[$name] = $ctl.Text
            }.GetNewClosure())
            return $ctl
        }
    }
}